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Which outcome occurs when a metal-oxide-semiconductor field-effect transistor (MOSFET) gate voltage exceeds the dielectric breakdown limit?

A)Channel inversion layer formation ceases
B)Gate oxide breakdown and short circuit
C)Threshold voltage shifts to negative values
D)Substrate current increases linearly

💡 Explanation

When gate voltage exceeds the dielectric breakdown voltage, the gate oxide capacitance's insulating properties fail because the electric field exceeds the material's breakdown strength, immediately creating a short circuit. Therefore, gate oxide breakdown occurs, rather than other effects that require transistor operation within specified voltage range.

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